It is the 31st century. The invading Clans drive towards Terra as the feudal houses of the Inner Sphere collapse into civil war. Amidst the ensuing chaos, will you be a forgotten casualty...or a living legend?
MechWarrior: Living Legends is 14v14 total war in the BattleTech universe. Stride the battlefield in a titanic BattleMech — or swarm enemy 'Mechs as armored infantry. Rule the streets as a tank commander, or pound the enemy with field guns and cruise missiles. Dominate the skies in fusion-powered aerospace fighters and nimble VTOL attackers.
Built on the Crysis engine, and featuring Battlefield's open maps and domination style gameplay. Matches escalate from skirmishes to ferocious armor battles and airstrikes. But you'll always start on even ground: there are no persistent unlocks or levels.
Total warfare in the legendary BattleTech universe. Standalone. Actively, passionately developed. Totally free.

MechWarrior: Living Legends 0.5.5 public open beta is now available for immediate download!
The release addresses a number of issues with the MWLL 0.5.4 release and introduces a few new features as well as the first complete pass of the draft build rules over all currently released vehicles.

From what I've read, the free CryEngine 3 SDK cannot create a true standalone game because it requires anyone who uses it to have a CryDev account. However, as the SDK comes with its own source code as a separate download, I'd imagine a workaround could be created.

After reading through the free CryEngine 3 SDK's EULA, I don't see anything which says, in translated legal jargon, "you can't bypass our login system". However, I'm neither a lawyer nor understand legal jargon well enough to come to sound conclusions from a legal document, so if anyone is or does either of those, you can peruse the SDK's EULA here: Crydev.net